Hydroxypropyl methyl cellulose (HPMC) is a natural polymer cellulose as raw materials, chemical processing and prepared a series of non-ionic cellulose ether. They have: water-soluble, water retention, non-ionic, PH value of the stability, surface activity, temperature reversible gelling, thickening, binding, film forming, lubricity and anti-enzymes and other characteristics. It is widely used for thickening, gelling, emulsification, dispersion and stability, water, improve the workability and other occasions.